Recurring pest problems often mean the source of the infestation hasn’t been fully addressed. Ants may have nests hidden inside walls or outdoors, while rodents can return if openings around the building remain accessible.

Moisture, exposed food, garbage and clutter can also attract pests. In apartment buildings, insects such as cockroaches and certain ant species may move between neighbouring units.

A professional pest inspection can help identify why the problem keeps returning. Depending on the pest, treatment may need to include additional visits, entry-point repairs or changes to the conditions attracting them.